S100A8 and diffuse large B-cell lymphoma: According to the results of statistical analysis (OR 6.43; 2.45–16.84 with 95% CIs; I2: 0.00; Q-value: 0.6; p value: 0.73; Egger’s p value: 0.21; Begg’s p value: 0.21), patients infected with cagA-positive strains are susceptible to DLBCL (Fig. 2).